Fuel burner and mixer.



PATENTED JULY 5, 1904.

T. DUDGEON. FUEL BURNER AND MIXER.

, APPLIUATION FILED OCT-17, 1903.

ITO MODEL.

. to construct a mixer of the burner of a single UNITED STATES PatentedJuly 5, 1904.

PATENT OFFICE.

FUEL BURNER AND MIXER.

SPECIFICATION forming part of Letters Patent No. 764,279, dated July 5,1904.

Application filed October 17, 1908. Serial No. 177,476. (No model.)

To all whom it may concern:

Be it known that I, THOMAS M. DUDGEON, a citizen of the United States ofAmerica, residing at Avalon, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements in FuelBurners and Mixers, of which the following is a specification, referencebeing had therein "to the accompanying drawings.

This invention relates to certain new and useful improvements in fuelburners and mixers, and relates more specifically to that class employedin connection with the burning of natural and artificial gas as a fuel.

One of the main objects of the invention is piece of sheet metal andprovide the same with integral means for securing the same to the backof the burner. Means is provided for forming an absolutely tight sealaround the edge of the mixer, whereby none of the gas will be permittedto escape except through the port leading to the burner-front.

Another of the objects of the present invention is to so construct aburner as to feed the gas thereto equally at all points and to providemeans whereby the burner-front may not be damaged by undue pressurebeing brought to bear against the same.

It is a still further object of the invention to so construct themixerof the burner as to offer no obstructions to the entrance of thefuel, and thereby avoid the common objection of the back-flashing of thefuel, due to the uneven or rough surface within the mixer.

The invention further consists in the novel construction, combination,and arrangement of parts to be hereinafter more fully described, andspecifically pointed out in the claims.

- In describing the invention in detail reference is had to theaccompanying drawings, forming a part of this specification, and whereinlike numerals of reference indicate like parts throughout the severalviews, in which Figure 1 is a detail plan view of the blank from whichthe mixer is formed. Fig. 2 is a detail. perspective View of the mixerdetached from the burner-back.

vertical sectional view of the burner complete. Fig. 4: is a frontelevation of the same.

in said overlapping engagement.

Fig. 3 is a transverse Fig. 5 is a detail plan view of a part of theburner-back, showing how the mixer is secured thereto. Fig. 6 is adetail plan view of a part of the burner-front.

Heretofore and before my invention it has been the common practice toprovide a castmetal mixer, which is provided with apertured lugs adaptedto be securely riveted to the burner-back. Many objections are to befound with this prior construction, as in event of one of the lugs beingbroken when securing the mixer in position a tight joint between themixer and burner-back cannot be obtained, and consequently the mixer isrendered useless, and in all probability the burner-back will also bedamaged to such an extent in the removing of the mixer that the samewill be also rendered worthless. Furthermore, the mixer being made ofcast metal is liable to be broken in shipment, so as to render theburner worthless. In myinvention I form the. mixer of a single piece ofbendable sheet metal, stamping out the blank by means of a suitable dieand bending up this blank into the shape to form the mixer. The blank A,as seen in Fig. 1 of the drawings, is produced, as stated, by means of asuitable, die which cuts the same out to form the projecting lugs 1,

the liigs 2, and lug 3 and an apertu red lug l. When the blank is soformed, 1 shape the same by means of a press and fold over the wings 5of the blank, overlapping the same, as seen in Fig. 2 of the drawings,and bending over the lug 3, as shown in said Fig. 2, to hold the wings Ialso shape the blank by means of a press to produce the flange 6, asseen in Fig. 2, and bend up the lugs 1 at right angles to the flange andalso bend up the apcrture'd lug 4: at a right angle to the rear wall ofthe mixer. The sheet 7, which forms the burner-back, is provided withslits made therein by the die or other suitable means to receive thelugs l of the burner, as clearly shown in Fig. 3 of the drawings. Afterthese lugs have been inserted in the slits made in the burner-back theyare clenched against the front of the burnerback by means of a suitablepress. The lugs 1 are passed through the gasket or washer 8, on whichthe flange 6 rests, whereby to form a pearance thereof.

perfectly tight seal to prevent the gas from escaping at any pointexcept through opening 9, provided therefor in the burner-back. Theapertured lug 1 is adapted to receive and form a holder for the nippleor spud 10, to which the gas-inlet pipe 11 is connected, as seen in Fig,3 of the drawings. The burner-back 7 is provided with verticaldepressions 12 near one side edge of the burner-back. which formpassages or feedways to permit the gas to feed equally therethroughthroughout the entire surface of the burner. The burnerfront consists ofa piece of sheet metal 14, corrugated to form the ridges 15, each ofwhich is provided with a row of openings 16, through which the gas isfed and at which point it will be ignited. The front of the burner isprovided with a covering of asbes tos, as shown at 17, as is the usualpractice,

this asbestos, as in the ordinary manner, be-' ing placed so as not tocover up the rows of openings 16, as clearly illustrated in Fig. 4. Thevertical ways or feed-passages 14 receive the fuel from thehorizontally-extending channel 18,.that communicates with openings 9,and feeds the said fuel to the remainder of the horizontal chambers 18throughout the surface of the burner. The ridges-15, formed by thecorrugating of the burner-front 14, are extended only slightly beyondthe vertical feed passages or ways 12-that is, are stopped intermediatethe side edges of the said burner-front 14and to take up the slack alongthe edges of the sheet which would be caused by the corrugating of thesaid sheet to produce the ridges 15 I crimp or gather the edges of saidsheet, as shown at 19. On these crimped or gathered edges 19 of theburnerfront I place what is commonly known in the trade as heading,consisting of a plastic material, and then bend over the edges of theback onto the plastic material and crimped edges of the front plate andalso onto the front plate at the upper and lower ends thereof. Toaccomplish this, the back plate 8 is made of a size sufliciently largeto permit the flanging or bending over of these edges onto the frontplate. A gasket 0r washer of asbestos may be placed between the frontplate and the back plate at the upper and also at the lower end thereof.

In the employment of cast mixers it is practically impossible to makethe same with a smooth interior surface, and the projections orroughened portions thereof cause the backflashing of the fuel, whichtends to blacken the front of the burner, and thus destroy the ap- Byforming the mixer of the single piece of sheet metal the'interiorsurface thereof with which the fuel comes in engagement is perfectlysmooth and all danger of back-flashing is avoided. In the formation ofthe burner-front I employ a press to form the corrugations or ridges andalso to produce the openings 16 in such a manner as to leave noprojections on the inner face of the burnerfront in the forming of theopenings. Heretofore where these openings have been punched through theburner-front projections left on the back of the burner-front areliableto catch and hold the carbon, which accumulates in such quantities as toclog up a number of the openings, and thus destroy the effectiveness ofthe burner. This is entirely obviated in the construction herein shownand described. In this type of burners it is the common practice toprovide a rear covering 21, of asbestos or other suitable material. Themixer being made of a single piece of sheet metal and formed entirely bydies and presswork is materially reduced in cost, as well as obtainingaconstruction by means of which the effectiveness of the burner ismaterially increased over the type of burner having a cast-iron mixersecured thereto.

In connection with my improved burner I prefer to make the hood 22detachable and adjustable. To accomplish this, the said hood is formedintegral with a gutter 23 of substantially inverted-U shape whichengages and fits on the upper end of the burner. The hood being made ofsheet metal covered with asbestos fiber may be readily bent to differentinclines, so as to increase or decrease the opening leading'to thechimney or flue, and thus regulate the draft. For instance, in the caseof a flue having a strong draft the hood may be bent down, so as todecrease the opening leading to the flue, and thus obtain a greaterradiation of the heat thrown off by the burner, while in the case of aflue havinga weak draft the hood may be bent up, so as to increase theopening leading to the flue. This construction of hood is alsoadvantageous, as in case of accumulation of fumes in the room the hoodmay be bent upward to increase'the opening to the flue and increase thedraft, and after the fumes are drawn up the flue the hood may be againbent down to obtain the'desired radiation.

IVhile I have herein shown and described my invention as it is practicedby me, yet it will be obvious that various slight changes may be made inthe details of construction without departing from the general spirit ofmy invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A burner comprising a burner-back having an opening, a burner-fronthavinglongitudinal corrugations and provided with crim ped edges, saidburner-back havingits edges bent over upon the burner-front,substantially as described.

2. In a burner, amixer formed fromabendable blank having Wings at oneend which are bent upward and then inward to overlap each other, theremaining portion of the blank being approximately concavo-convex andpro- ICC having integral bending securing-lugs adapted to pro ectthrough the contiguous burnerwall and be bent thereon, and an integralapertured lug at the lower end of the burner extending at right anglesto the body of the mixer.

In testimony whereof I affix my signature in the presence of twowitnesses.

THOMAS M. DUDGEON. Witnesses:

A. M. WILSON, E. E. POTTER.

